Malicious PDF — malware analysis report

Static analysis result for SHA-256 72540f51c5942014…

MALICIOUS

PDF

74.8 KB Created: 2021-03-12 06:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 08128b2c8d021103407c18ccfacf56a6 SHA-1: 1049c8272cc1b21c9dc0a2be5b82a70aa75a371e SHA-256: 72540f51c59420147dc585c0e61a6b67c3248c58fc02245f9f094bcb9108a00d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The primary IOC is the redirector URL, which is likely used to host a phishing page or download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/award?keyword=water+pollution+causes+and+effects+pdf In PDF document text
    • http://lozomaneje.getenjoyment.net/how_much_does_brinks_messenger_pay.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/16722908762.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/how_to_use_a_polaroid_tablet.pdfIn PDF document text
    • http://xijonofupawulo.mypressonline.com/keloma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/694c89b5-ab49-4c83-b326-5eaa769ea3a5/boy_scout_cooking_merit_badge_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf0aff0-de9a-4645-aa8c-aeb21ce58a63/2003_honda_civic_maintenance_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/how_to_write_a_movie_script_beginning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d4bed2-bb07-4826-a857-bcabb9c2e18d/logitech_r800_mac_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cfeeb1f-5fe9-4f97-b6e1-0e76fb7514c1/kefojejejikex.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/google_drive_via_idm.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/28117292018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d3c9f4-3b12-4e14-b46d-9af415dbb438/posurawigiveratokejasabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01067d7-4f48-4062-85ef-21f09aff1554/95788242140.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/sijiseneronafijowikinule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47085ffc-d8a2-4ec0-8267-1cb0c7f64d03/wimil.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/hiring_plan_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/intro_to_trigonometric_ratios_worksheet_answers.pdfIn PDF document text
    • http://fatavetotujel.onlinewebshop.net/gusumejejef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54fc2a46-7f8b-4d8f-b3c1-1a2b8c39e11c/how_to_calculate_power_across_a_resistor.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/wuvojo.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/nko_ammo_51_test_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE819 5164 bytes
SHA-256: 158d23f4faee1350fccc34d960929f7bf44551a8ef44285b1da5e233b63c4c0e
font_01_sfnt_off0000f9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C3 10616 bytes
SHA-256: 6b7d9796fa731d0c7b9e375779fb6e45cda4640c7fbff3b7a7acebac26c90288

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